Natural Language Toolkit Natural Language Toolkit (NLTK) is an open-source library of tools for natural language processing (NLP). It provides easy-to-use interfaces to over 50 corpora and lexical resources such as WordNet, along with a suite of text processing libraries for classification, tokenization, stemming, parsing, and semantic reasoning, wrappers for industrial-strength NLP libraries, and an active discussion forum. NLTK is accompanied by extensive documentation and tutorials which make it accessible to both novice and expert users. NLTK is the most popular Python library for natural language processing, and is used by researchers, educators, students, and industry practitioners.
https://www.nltk.org/